My Devore Nines never sounded better than with the Linear Tube Audio Ultralinear amp (18W), across the entire frequency spectrum. Better than my previous pairings: Almarro A318B (had beaten all comers ’til LTA), Leben CS300xs, Firstwatt F7, Elekit TU-8600 (300b), Line magenetic 211i (el34), Red Wine Audio (hybrid). I have the version in the larger case that has a volume control, but mostly drive it with an eastern electric minimax preamp. Body with articulation, clarity and soundstage, worth a listen!